Q158. What is the difference between a Choice and a List?A Choice is displayed in a compact form that requires you to pull it down to see the list of available choices. Only one item may be selected from a Choice. A List may be displayed in such a way that several List items are visible. A List supports the selection of one or more List items.

Q159. What class of exceptions are generated by the Javarun-time system?The Java runtime system generates RuntimeException and Error exceptions.

Q160. What class allows you to read objects directly from astream?The ObjectInputStream class supports the reading of objects from input streams.